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1. 河北大学 物理科学与技术学院,河北 保定,071002
2. 航天长征火箭技术有限公司 北京,100076
收稿日期:2013-04-11,
修回日期:2013-05-03,
纸质出版日期:2013-07-10
移动端阅览
杨艳民, 米超, 刘琳琳, 张娇, 于芳, 李晓东, 李刚, 焦金鹏. 方波激发下Ho<sup>3+</sup>上转换绿色发光粉的激发机理[J]. 发光学报, 2013,34(7): 866-871
YANG Yan-min, MI Chao, LIU Lin-lin, ZHANG Jiao, YU Fang, LI Xiao-dong, LI Gang, JIAO Jin-peng. Dynamic Process of Green Upconversion Emission from Ho<sup>3+</sup> Under Square Wave Excitation[J]. Chinese Journal of Luminescence, 2013,34(7): 866-871
杨艳民, 米超, 刘琳琳, 张娇, 于芳, 李晓东, 李刚, 焦金鹏. 方波激发下Ho<sup>3+</sup>上转换绿色发光粉的激发机理[J]. 发光学报, 2013,34(7): 866-871 DOI: 10.3788/fgxb20133407.0866.
YANG Yan-min, MI Chao, LIU Lin-lin, ZHANG Jiao, YU Fang, LI Xiao-dong, LI Gang, JIAO Jin-peng. Dynamic Process of Green Upconversion Emission from Ho<sup>3+</sup> Under Square Wave Excitation[J]. Chinese Journal of Luminescence, 2013,34(7): 866-871 DOI: 10.3788/fgxb20133407.0866.
采用溶胶-凝胶法制备了BaGd
2
ZnO
5
:Yb
3+
Ho
3+
的发光材料
测量了样品在不同激发密度下的上转换光发射光谱。用方波调制的971 nm LD激光激发样品得到上转换绿光发射的上升和衰减变化曲线
通过建立Ho
3+
离子
5
F
4
(
5
S
2
)和
5
I
6
能级及Yb
3+
离子
2
F
5/2
能级的速率方程
并利用速率方程对绿光的上升和衰减过程进行拟合
确定了Yb
3+
离子
2
F
5/2
能级寿命及Ho
3+
离子
5
F
4
(
5
S
2
)和
5
I
6
的能级寿命
并证实在Ho
3+
离子能级粒子数布居趋于稳定时
Yb
3+
Ho
3+
的能量传递是Ho
3+
离子
5
F
4
(
5
S
2
)能级粒子的主要布居途径
而激发态吸收对粒子布居数的贡献较小。
Yb
3+
and Ho
3+
codoped BaGd
2
ZnO
5
phosphors were synthesized by using the sol-gel method. The upconversion emission spectra of BaGd
2
ZnO
5
:Yb
3+
Ho
3+
phosphors were measured under the excitation of 971 nm LD laser at different excitation density. Under the excitation of 971 nm LD laser modulated by a square wave signal
the excited and decay processes of green upconversion luminescence in Yb
3+
/Ho
3+
codoped BaGd
2
ZnO
5
were observed by an oscilloscope. The rate equations of energy level
5
F
4
(
5
S
2
)
5
I
6
with Ho
3+
ion and energy level
2
F
5/2
with Yb
3+
ion were built to analyze the upconversion mechanism in Yb
3+
/Ho
3+
codoped system
then the rate equation of the energy level
5
F
4
(
5
S
2
) with Ho
3+
ion was used to fit this processe in order to determine the lifetime of the energy levels. When excitation is steady
the population of
5
F
4
(
5
S
2
) energy level with Ho
3+
ion mainly come from the energy transfer from Yb
3+
to Ho
3+
and the effect of excited state absorption was able to be ignored.
Auzel F. Compteur quantique par transfert d' nergie de Yb3+ Tm3+ dans un tungstate mixte et dans un verre germinate[J]. C.R. Acad. Sci. Paris, 1966, 263B:819-821.[2] Dong B, Cao B S, Feng Z Q. Optical temperature sensing through extraordinary enhancement of green up-conversion emissions for Er-Yb-Mo:Al2O3[J]. Sensors and Actuators B, 2012, 165(1):34-37.[3] Verma R K, Rai S B. Laser induced optical heating from Yb3+/Ho3+:Ca12Al14O33 and its applicability as a thermal probe[J]. J. Quant. Spectrosc. Ra. Transfer., 2012, 113(12):1594-1600.[4] Li S Q, Lin J M, Wu J H, et al. Applications of up-conversion luminescence in dye sensitized solar cell[J]. Chinese J. Inorg. Chem.(无机化学学报), 2009, 25(1):60-64 (in Chinese).[5] Zou S Y, Xiao Q L, Deng X L, et al. Synthesis and upconversion luminescence of In2O3:Ho3+,Yb3+ nanocrystals[J]. Chin. J. Lumin.(发光学报), 2011, 32(7):655-659 (in Chinese).[6] Wang M, Abbineni G, Clevenger A, et al. Upconversion nanoparticles:synthesis, surface modification and biological applications[J]. Nanomedicine: Nanotechnology, Biology, and Medicine, 2011, 7(6):710-729.[7] Lin M, Zhao Y, Wang S Q, et al. Recent advances in synthesis and surface modification of lanthanide-doped upconversion nanoparticles for biomedical applications[J]. Biotechnol. Adv., 2012, 30(6):1551-1561.[8] Cao Y L. Applications of infrared upconversion materials in anti-counterfeiting technology[J]. Laser and Infrared (激光与红外), 2001, 31(3):190-191 (in Chinese).[9] Yang Y M, Jiao F Y, Su H X, et al. Preparation and upconversion luminescence dynamic process of Yb3+/Er3+ co-doped BaGd2ZnO5[J]. Spectrosc. Spect. Anal.(光谱学与光谱分析), 2012, 32(10):2637-2641 (in Chinese).[10] Du H Y, Yang Z P, Sun J Y. Research status and prospect of upconversion luminescence materials and luminescence efficiency[J]. New Chem. Mater.(化工新型材料), 2009, 37(9):5-9 (in Chinese).[11] Kaczkan M, Malinowski M. Upconversion-induced ultraviolet emission in Ho3+ doped SrLaGa3O7 and SrLaGaO4 crystals[J]. J. Alloys Compd., 2004, 380(1/2):201-204.[12] Cheng Y Q, Li C R, Niu S Y, et al. Spectral analysis of Ho3+ doped and Ho3+,Yb3+,Er3+ co-doped up-conversion luminescence borosilicate glass[J]. Chin. J. Lumin.(发光学报), 2011, 32(5):433-439 (in Chinese).[13] Li X J, Nie Q H, Dai S X, et al. Energy transfer and frequency upconversion in Ho3+/Yb3+ co-doped bismuth-germanate glasses[J]. J. Alloys Compd., 2008, 454(1/2):510-514.[14] Etchart I, Hernndez I, Huignard A. Efficient oxide phosphors for light upconversion:green emission from Yb3+ and Ho3+ co-doped Ln2BaZnO5 (Ln=Y, Gd)[J]. J. Mater. Chem., 2011, 21(5):1387-1394.[15] Pollnau M, Gamelin D R, Lthi S R. Power dependence of upconversion luminescence in lanthanide and transition-metal-ion systems[J]. Phys. Rev. B, 2000, 61(5):3337-3346.
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